TO GO WITH AFP STORY BY JEROME CARTILLIER
(FILES) A file photo taken on October 4, 2006 shows a diver attaching a sensor on a large Echizen jellyfish off the coast of Komatsu in Ishikawa prefecture, northern Japan. The dramatic proliferation of jellyfish in oceans around the world, driven by overfishing and climate change, is a sure sign of ecosystems out of kilter, warn experts. Two centuries worth of data shows that jellyfish populations naturally swell every 12 years, remain stable four or six years, and then subside. 2008, however, will be the eighth consecutive year that medusae, as they are also known, will be present in massive numbers. AFP PHOTO/YOMIURI SHIMBUN